package com.zhenzu.jucUtil;

import java.util.concurrent.CountDownLatch;

/**
 * 演示CountDownLatch
 */

public class CountDownLatchDemo {
    public static void main(String[] args) throws InterruptedException {

        CountDownLatch countDownLatch = new CountDownLatch(6);


        for (int i = 1; i <= 6; i++) {
            new Thread(() -> {
                System.out.println(Thread.currentThread().getName() + " 号同学离开了教室");
                countDownLatch.countDown();
            }, String.valueOf(i)).start();
        }

        countDownLatch.await();
        System.out.println(Thread.currentThread().getName() + " 班长锁门走人了");

    }
}
